Transmission and control mechanism for milling machines



Feb. 1,0, 1931. A. PARSONS I 1,791,534

4TRANSMISSION 'ANO CONTROL NEcHANIsN FOR MILLING ncNINss Filed Sept- 8. 1925 sneets-sheqt--l Feb. 10, 1931.. l I F, A, PARSONS 1,791,534

TRANSHISSIQN` AND CONTROL MECHANISM FOR MILLING vACHINES V g. l du 6 Sheets-Sheet 3 F. A. PARSONS r//// /AAll rM//H/ M1 TRANSMISSION AND/CONTROL MECHANISM FOR MILLING BACHINES Fei). l0, 1931.

F'lg. 4

' F. PARSONS TRANSMISSION AND CONTROL MECHNISM FOR MILLING UACHINES Filed Sept. 8, 1925 6 Sheets-Sheet 4 Feba l0, 1931.

F. A. PARSONS TRANSMISSION AND CONTROL MECHANISN FOR IILLING IACHINES Filed Sep'b. 8, 1925 6 She'etS-Sheet 5 Fehn l0, 1931. F. A. PARSONS v 1,791,534

TRANSMISSION AND CONTROL MECHANISM FOR MILLING HACHINES Filed Sept. 8, 1925 6 Sheets-Sheet 6- Fig. 15

INVENToR Patented Feb. 10, 1931 MNE? i sr'rss FRED A. PARSONS, OF MILWAUKEE, V'ISCONSN, ASSEGNOR TO KEARNEY & TRECKER CORPOl-ATON, OF WEST ALLIS, WISCONSIN TRANSIVISSION AND CGNTROL MECENISM FOR MLLING MACHINES Application filed September 8, 1925. Serial No. 54,914.

This invention relates to improvements in a machine tool organization, and more particularly to transmission and control mechanism for milling machines. l

A purpose of this invention is to improve a transmission and control mechanism in its :1' tofore found in milling machines.

Another object is generally to simplify and improveV thedesign, construction and operation of a milling'machine organization, including` the transmission and control mechanism, and including the particular type of milling machine here shown.

l/Vith these and other objects in view my invention resides in and consists of the novel construct-ions herein shown and described 'S and particularly pointed out in the claims together with such modifications as do not depart from the spirit and scope of the claims, it being apparent that my invention is susceptible of a variety of equivalent modified u forms.

In the drawings, in which like reference characters indicate the same parts rin the several views:

Fig. 1 is an end elevation from the right l hand side of a milling machine of a type distinguished by a vertical movement of the tool spindle rather than thelworlr. The operator normally stands at the left of Fig.

l 1, which is therefore here considered as the front of the machine, and stands facing the work table, and such a position will be used to identify right, left hand, and front portions of the mechanism in the following descrip- .1 tion.

Fig. 2 is an enlarged portion of the end elevation shown in Fig. 1.

Fig. 3 is an enlarged portion of the top view or plan shown in Fig. 12, a portion being in horizontal section.

Fig. 4 is a partial sectional elevation taken along the line 4 4 of Fig. 3.

Fig. 5 is a partial sectional elevation taken along the line 5-5 of Fig. 3.

Fig. 6 is a partial sectional elevation taken along the line 6-76 of Fig. 3 and alongline 67-6 of Fig. 9.

Fig. 7 is a partial sectional elevation taken along the line 7-7 of Fig. 4.

Fig. 8 is a partial front elevation, partially in vertical section, the sectionalportion'being taken along line 8 8 of Fig. 2.

Fig. 9 is a horizontal partial section taken along line 9 9 of Fig. 2, a portion only being taken along a. lower plane as will be later noted. f

Fig. 10 is a vertical partial section along line 10-10 of Fig. 3.

Fig. 11 is a vertical section along a trans# mission shaft and associated members as indicated by line 11-117of Fig. 9.

Fig. 12 is a plan view of the milling machine shown in above views, some of the structural supports shown in Fig. 1 being omitted for clearness.

Fig. 13 is a partial vertical section along line 13-13 of Fig. 12. n

Fig. 14 is a. partial rear elevation of the machine.

Fig. 15 is a sectional development o spindle drive gearing taken approximately along the line 15-15 of Fig. 14 and enlarged.

Fig. 16 is an enlarged portion of Fig. 6.

Fig. 17 is a` top .or plan view of a part of the mechanism shown in Fig. 16.

Fig. 18 is an enlarged vertical sectional view of a portion of the motion transmitting mechanism for the control device, as will be later described.

Fig. 19 is a partial vertical section line 19-19 of Fig. 12.

A bed or stationary support A is provided with a horizontal guide way, or slide upon which a table or work support B is adapted to reciprocate and with a second guideway or slide upon which a main spindle support or column C is adapted to be adjusted back and forth transversely to the directionof table movement whereby relative movement between the work and a tool spindle D is accomplished in two transverse directions in horizontal planes.

A spindle carrier or support E rotatably supporting spindle D is adjustable on a vertical slide on the face of the column C thus providing a third relative movement transverse to the two support movements previously mentioned. 'l ie means whereby the movement of table B may be effected will be later described. For the movement of column C a rack C1 (see Fig. 19) is lixed with the column and has angular teeth meshin with the teeth of a worm C2 fined for rotation with a shaft C3 rotatably supported but fixed Vagainst axial movement in bed A and having an extended shaft portion provided with a. squared end Celrf.. hand cranl, not shown, may be applied to the squared end (f the shaft for effecting movement of column For the movement of spindle carrier E a nut El (See Fig. 1) fixed with carrier E en- Uages a screw E2 rotatably supported but xed against axial movement in Ythe column C. Screw E2 is provided with a squared end portion E3 to which a hand cranl; not shown, may be applied for effecting vertical lnovement of the carrier.

When positioned the various supports may each be rigidly clamped in position by the means of suitable bolts which of themselves present no novelty and which are applied in a manner, except as noted below, apparent and well known to those familiar with the art and which will therefore not be particularly described. The exceptions mentioned refer to the two overarms F and associated supporting and clamping devices which form the subject matter of previous patent applications Serial No. 27 ,392, filed May 2, 192' and Serial No. 27 ,393 filed May 2, 1925.

Gverarms F are adjustably clamped in the support E and may extend out over the table B, there being means provided for rigidly supporting the ends thereof when in such position, consisting of a harness or support G removably fixed with bed A and a support member H vertically adj ustably lined thereon and adapted to engage with the overarms which may each be rigidly clamped therewith, the construction being such as to provide for the vertical adjustment of the arms F with the support E and the rigid clamping of the several structural and supporting parts in each of the several positions of adjustment.

An intermediate arbor support or pendant J is adjustably clamped to the overarms F and the supports H and J are respectively provided with arbor bushings H1 and J 1, the bushings being positioned in axial alignment with the spindle D and being rigidly maintained in such a position by the described structure whereby a tool arbor not shown may project from and be driven by spindle D and be maintained in axial alignment therewith, rotating in the bearings H1 and J 1.

A main pulley or driving member 1 provides a power source in the machine unit for actuating the spindle D and table B, being arranged to be driven from any suitable eX- terior or distant source by any of the conventional methods. rlhe pulley revolves on the exterior surface of a cylindrical extension 1ct of the housing 1?) which is lined to the bed A. An interior bore in the extension la provides a bearing for a shaft 2 on the one end of which a clutch member 10 is slidably mounted in axial alignment with a clutch member 1e lined with the pulley 1. The clutch members may be moved into engagement to drive shaft 2 from pulley 1, or may be oppositely moved for disengagement, by the means of a hand lever 1f located in a position convenient for the operator and con nec'ted for movement of the clutch member 1c through shaft 1g, lever 17a, rod 1j and lever 17.: which is pivoted in the clutch housing and is provided with a .fork at the one end engaging with an annular groove 1m in the clutch member 1c.

lVhen the clutch members 1c and le are engaged to drive shaft 2, 'the spindle D is ro tated by spindle drive mechanism forming 9 the subject matter of a co-pending application Nerial 54,4641 filed Sept. Ll, 1925, which will here be only briefly described as follows:

Shaft 2 slidably engages a sleeve 100 rotatably supported in column il in a position of axial alignment with shaft 2, whereby sleeve 100 will be driven from shaft in any of the positions of adjustment of the column on bed rr. At the oA e end of 100 is i movably splined a change or slip gear` meshing with a gear 102 removably splined on the one end of a sleeve 103 rotatably supported from stud 1041; .fixed in column U. At the other end of sleeve 103 is removably splined a change gear 105 which meshes with a change gear 106 removably splined to the one end of a shaft 107 rotatably supported in the column C. A bevel 108 lined for rotation with shaft 107 meshes with a bevel gear 109 rotatably supported in a swinging bracket 110 pivoted and supported to be moved about the axis of shaft 107'. Slidably splined in the elongated shank of gear 109 is a shaft 111 provided with a bearing in a swinging brachet 112 pivoted and supported for movement around the axis of spindle D. Shaft 111 has lined upon its one end or solid with the shaft a bevel gear 113 meshing with abevel gear 11d fixed upon a hub 115 and which is splined to and supported from spindle D.

The construction above described permits of maintaining a driving relationship be tween shaft 2 and spindle D in any of the positions of adjustment of the column C on spmdle may he chB n t eth1@ l peteo'ing other twin portions fem dauage if the machine ie wer'loeded',V and e removable cove? plate 24J) is provided to permit accese o the pin 24a for replacement and also to the described Changeable gem' pairs for eo'wenenoe in eeotng the feed changea A shaft 2S is postoneo in axial eligmnen Wh ehaf 24e 1d is roeahly suppored in in a Case o1' housing 8O Suppm 'Jed from L and is connected o be hive? fems by the coupling members on oy izlegral with shaft 26 is a u gea? 27 rotatably amejer of e. sleeve The which drives on the oue 24'@ fixed m housing geur suppoled o1 bushh 80.

Clutch me connected A\ Mechanism will new be desollhed Wheehv f t may he eeueed from shaft eompezetvey apd, Constant speed niek traverse rate when the feed clutch member 28 is disengaged frongear 2'?.

L helical gea? 16 is xel ou shaft 14 and chives meting' heeal 5e-a1' il Exel on a shaf rotelhy supported in a Suitable hearing in the b 2; o1' housing 14?), Axay agned with shaft 42 is :1 Shaft die eee Fig. il) rombahly supported in an axial heee in a sleeve member 416, which in tum rotatably eugpo'ed in e bushing 6a fixed 'in housing@ 80, the sleeve mei shef being free y-om ndeoeudent rotation uness ohehed eoggeher e later desobei. m

neeed to be duven tiene she by ihe Leens: o' toothed oouphug memhee 42a and L .L n'ed to the leepect'e shafts m d in mu- -eeve le eonnecte for movemen shef; 29 the means of e geel' on 'he'one end of Jshe seev and meshing Wh a4 gear L8 fixed on the hub of e. bevel. geen' 30 keyed o Sheff' 29.

Sl-eve 5 may be connected for movement rofi She filler disconnected therefrom by the means of e quick treverse dutch mem- 1 or element slidehlj/ spned with shaft )rovded on the one end with @hitch engegenhle Wh eomplemenm'y clutch on the sleeve e6 when member ie ed. in the proper direction. When the L L feh e5 ie so conneeed to drive sleeve 46 shaft 14 will drive shaft 29 through the above described train elements, without passing the drive through the variable feed gearing and Without passing through gearing of large s eed reduction, whereby, when so driven saai-t Q9 will rotate at a constant, comparatively rapid quick traverse rate.

The clutch members or elements 28 and 45 are connected together for simultaneous movement by the means of a shift member or lever (36 pivoted in housing 8O (see Fig. 7 and Fig. ll). Annular grooves are provided in the respective clutch members and pivoted shoes 66aand 66?) engage with the grooves ot' the respective members, the arrangement being` such that when the clutch member QS is engaged to be driven from. gear 27 then clutch member will not be in driving engagen'ient with the sleeve QG, and vice versa. Thus shaft Q9 may alternatively be driven at 'feed rate frei 2i' or at a quick traverse rate from l d, but sin'iultaneous driving engagement at l oth rates is prevented.

The alternative feed or quick traverse movement imparted to shaft 29 may be caused to actuate table B iu either direction by the means of mechanism as follows:

The bevel gear 30 previously mentioned as fixed on sha. t i9 is mcshed at opposite sides thereof with bevel gears 3l and 32 (see Figs. 9 and l) which are respectively rotatably supported on the outer diameter ot bushings or sleeves 3l and 32e each lined in axial alignment in housing 80, thus giving` opposite directions ot rotation to the r spective bevel gears. il shaft di is rotatably supported in axial bores in the bushii 31o and 32a and lixed on shaft 34e is a clutch member flo having at its opposite ends clutch teeth or elements respectively adapted to engage with and be driven from complementary teeth on the bevel gears and when clutch member 35 is suitably shifted.

The shaft 34: together with the clutchmenr ber 35 shiiitable in either direction and when shifted in the one direction tne clutch teeth or elements on the one end of clutch member 35 will engage with the complementary teeth or clutch elements on the one bevel gear, when sha 34 will be driv n in the one direction. Shifting the clutch in the other direction will engage the clutch teeth on the other end et clutch member with the complementary teeth on the other bevel gear and will result in the opposite direction ot drive for the shaft itin intermediate position oit' the clutch member 35 permits disengagement 'from both bevel gears and will cause the shaft Eli-il: to remain stations q Fixed with or solid with the member 35 is a gear 35e which meshed with O'ear 8l rotatably supported in a bushing S2 vi2-red in bed A. Gear 8l is of wide tace to maintain full engagement with gear 35a despite oi" a collar Si threaded and locked on the lead screw, and a collar or enlargement 88 lined on or integral with the lead screw, the table B being thereby Jforced to move with the screw should the screw be axially moved. To give axial movement to the screw when rotated a nut/89 lined both against rotation and axial displacement in lied fr engages with the threads of screw 8G. By the transmission train mechanism described, the screw 8G may be rotate(VL in either direction or may remain stationary and hence 'table B may be moved in the one or the other direction from bevel. gears 3l or 32 or may remain statioi according to the position ot clutch member The screw 8G is provided with a clutch member 9() having clutch teeth suitable :for

,agement from complementary teeth on a ya ble hand crank, not shown7 whereby the wv may be manually rotated to adjust or move the tal le when clutch member 35 is in its central position.

The shiitable clutch member and assow ciatcd mechanism previously described provides a table reversing and motion interrupting mechanism, vJ :le the clutch n'icmbers 2S and 45 together with associated mechanism previously described provide an alternatively available feed or quick traverse mechanism whereby the table and a control carrier to be later described may move at feed or quick traverse rates, the clutch means whereby alternative feed or quick traverse is accomplished also providiiw a motion interrupting means under certain conditions as will be pointed out. For these mechanisms a variety of control or trip means are provided which, while cooperating lor a variety ot useful rcsults as will be later explained, may be igor purpose et description, divided under the headings ot hand control, table dog control and drum or carrier dog control., each of which vill now be described.

The hand control or .hiftin et the table reversing, nechanism is accomplished by the means of a hand lever 5l removably threaded in or otherwise removably fixed with a trip member 51a iiied on th-U appr end oi a trip post or member (39 suitably journaled or pivoted in housing 80, and having` its lower end a. trip member 5l?) lived on or solid with the post. A lever 70 is pivoted on a pin 70e fixed inl housing 8O and is provided at the one end with gear teeth 510 'forming a gear segmentmeshing with a gear segment on the member 515. At the other end the lever is provided vwith a fork 51d engaging an annular slot in a yspool 34a fixed on or solid with shaft 34. The shifting of hand lever 5l may .rock the post -69 and through the described other end of which is fixed an arm or leverY 76a. A rod 67 (see Figs. 6w7-9) is pivoted at the one end to the clutch lever 66 by the means of a pin 67a and at the other end is slotted for receiving the arm 7 6a. A pin 77 is .fixed in the rod and passes through the arm. Thus a manual rocking of the lever may through the described mechanism rock lever 66 to alternatively engage either clutch l5 or clutch 28 thereby effecting either a feeding or a rapid traverse movement of the table if the reverse clutch member 35 is in either position of engagement.

Table dog control is provided for an interruption of table movement by disengagement of clutch member 35 and is effected by the means of table dogs as follows: The member 51a is provided with oppositely extending ears or lugs 9l and 92 (see Fig. 3) and another lug 93, each of the lngs being on different horizontal levels to be contacted by different table dogs. rllhe previously described table transmission mechanism and hand control mechanism is of such effect that when the handle 5l is rocked to the left the table will travel to the left. ln such case the lug 91 will be rocked inwardly toward the front edge of the table. A. dog 7 l is adjustably and removably mounted at the front table edge by the means of a bolt 74e engaging a T slot 74a, and carries a projecting portion 7d?) suitably positioned and of suitable form and dimen- 1 .sions to contact with the lug 91 as the table is moved, and continued movement of the table will then force the lug back to its original position thereby moving the trip post and, through the previously'described connecting members. the clutch member 35 to a central position and interrupting the power movement of the table. lWhen the handle is moved as descr 1bed,`the lug 93 is moved to 'lhe right and a dog 75 is permanently fixed with the table to eventually contact lug 93 and move it back to the left again and thereby trip or ,lisengage the table feed positively in the Case that tno operator neglects to put on or suit` ably adjust the dog 74 to trip the feed before the' table over runs the limits of its left hand movement. The dog 75 thus acting as a permanent and fixed stop to prevent breakage or damage. A dog similar to dog 74 but on the other end of the table may similarly trip; the table when moving in a right hand direction, such a dog contacting the lug 92; and a xed or safety dog similar to 75 is fixed at the left end of the table to similarly contact lug 93 but on the opposite side to positively prevent the table from too great a power movement to the right'. The reason for lug 93 being in a different horizontal plane is to permit the adjustable dogs to pass over the positive or fixed dog and thus provide adjustableV tripping up to the extreme limit of table travel. Lugs 92 and 93 are in different planes in order that after a dog has contacted the one lug to trip the table feed the lever may be immediately movedv to a position to produce a power return of the table without subsequent interference between the other lug and the dog, which must then retreat past the other lug.

A drum or carrier control of the table movement is provided in addition to the controls above described. A drum or carrier member 52, suita ly journaled for rotation is given a power movement even when the table is stationary and is provided with adjustable dogs mounted on'its periphery and with associated mechanism for the engagement and disengagement bothl of the table reversing mecha.- nism and of the mechanism for changing the table rate from feed to quick traverse as will be now described.

Power movement is applied to the carrie 52 from the shaft 29, upon the extended front end of which is fixed a sleeve or collar 94 (see F ig. 9) to which a'gear 58 is removably keyed. Gear 58 meshes with and drives a gear 57 removably keyed at the outer end of a sleeve 95 rotatably supported on ay stud 96 fixed in a block or member 97 which in turn is fixed with the housing 80. The inner end of sleeve 95 carries a gear 56 removably splined thereto and which meshes with and drives a gear 55 removably splined to the extended shank of a bevel gear 59 rotatably supported in the block 97 in a position of axial alignment with shaft- 29, and through the axial bore ofwhich the outer end of shaft 29 Vis rotatably supported. Bevel gear 59 meshes with and drives a bevel gear 60 fixed on the extended shank or shaft of a worm 61 which is supported for rotation in housing 80 and which meshes with and drives a worm wheel 62 supported for rotation on stud 626 fixed in housing 80. rl"he worm wheel 62 is provided with an elongated shank portion 62a upon which the drum or dog carrier 52 is removably keyed, being retained in position by the means of a nut removably threaded on the stud 62?). Through the train thus described the carrier 52 may be rotated from shaft 29, and from the above it will be seen that carrier movement is independent of whether or not the table is ever moved.

The gears 57 and 58 constitute a change gear pair which are reversible in their position in the train. The gears and 56 likewise constitute a reversible change gear pair. The gears of the individual pairs are oi different diameter and the two pairs are of different ratio whereby possible positions of the two pairs may eli'ect tour different driving ratios` between shai't 29 and carrier 52, and a` greatvariety of other ratios may be obtained by the use ot still other suitable gear pairs interchanged with one or both ot the gear pairs shown.

The drum or carrier 52 is provided with two series or rows of adjustable dogs typilied by the dogs 53 and 54 (see Figs. 6 and 16). These dogs may be clamped in any position around the periphery of drum or carrier 52 b v the means of clamp blocks 52a the carrier being provided with a T slot and the clamps having aY screw and nut coacting therewith as shown. Although two dogs are shown with a single clamp reacting against both, a single dog may be clamped by the means of clamp 52a, the clamp being provided with an extension fitting in the T slot as shown which serves to take the clamping reaction in the absence of a second dog.

Dog 54 may rock trip post 69 as the dog is moved with the carrier. In Fig. 16 the dog is shown with an upstanding projection 54a and post 69 with a downwardly projecting lug 69a. The lug 69a is shown in a position corresponding to the central position of lever 51 and hence to a neutral or nonpower-trans mitting position of the table reverser member 35. It is obvious that by suitable configuration and dimensions of the upstanding portion 54a of a variety ot' dogs similar to dog 54 the lug 69a may be moved to right or left in Fig. 16. or being in either ot' these posi* tions may be moved back to a central position or to the other position as the dog advances with the carrier, and that a number of dogs suitably fashioned and spaced may produce these movements one after another in any order to move as desired the table reverser clutch member 35 connected with post 69 and hence with lug 69a.

The dog 53 may similarly control the clutches 28 and 45 whereby the table rate is changed from feed to rapid traverse or vice versa, as follows: A trip post 68 is suitably journaled or pivoted in housing` 80 and provided with a downwardly projecting lug 68a on an enlarged head portion 685 t see Fig. 10) which is also provided with a suitable aperture to receive a ball shaped end 76?) on the lever 76a, whereby motion of the lug 68e set up by drum dogs 53 may be transmitted to lever 76a and therefore to rod 67 and to the clutches 28 and 45. Since the upstan din g portion 53a may obviously if suitably fashioned, rock the lug 68a in either direction as' the drum or carrier advances, a number of dogs similar to dog 53 and moving with the carrier 52 and of suitable forni and position oi. adjust-ment on the carrier may produce these movements, one a i'ter another at intervals in any order as desired, and thus alternate the table rate between ieed and quick traverse iii' the clutch member 35 is engaged.

Reverser clutch 35 should be yieldingly held in a well delined central or non-driving position, and when engaged in either direction, especially when engaged from a carrier dog, should be quickly shifted to full engagement past the position of partial engagement. To accomplish this the lower end of trip post 69 is enlarged to form a cani mem ber 69h (see Fig. 9) against which a point 72a of a member 72 pivoted on a pin 79]) liized in housing 80, is pressed by a spring 7?). The cam portion 69?) is formed with a central notch as shown which is positioned to maintain the clutch member 35 in its central position when the notch is engaged by the point '72a but Vfrom which position it may be shifted by overcoming spring 73. The notch is of such extent that the two points formed on the cam will respectively pass the point 72a just before the clutch engages in the one or the other directions, itollowingwhich the spring pressed point 72a will react on the caln 696 to quickly shift cam and the associated. parts and fully engage the clutch.

To effect a reversal of table movement the engagement of clutch 35 in the opposite diof manufacture and assembly and for other if reasons. To avoid this delay lost motion is provided between some oiI the motion transmitting connections between the cam 69?) and the clutch 35, in this case between the Atork 510i of lever and the annular groove in spool 34a as shown in Fig. 9, such lost motion being provided by merely making the fork. a trifle narrower than the groove as there indicated. The lost motion and connecting parts are so proportioned that the cam 69?), when the clutch is moved in either direction by the means of the dog 5i will move before the clutch 35 moves, so that when the clutch finally disengages, the cam is so positioned relative to the point 720: that a very little additional dog movement will move the cani to a position where the point .7266 reacts und. r the pressure of spring 73 to quickly engage the clutch in the opposite direction. A

The post 68 is likewise provided with a lil@ cam 682') engaged by a coacting point 71a on pivoted member 7l, point 71a being; spring pressed by a spring 73a, but since the clutches controlled from post G8 need never be in a non-powertransmitting position except as will be later described, no central notch is provided in cani 685, this cam having' a single central point correspencing to the position of disengagement of both the clutches 28k and lt is desirable that these clutches should never remain in a disengaged position except as will be later described, even during the intervalnecessary for the carrier dogs to shilft them through the extra space required for clearance or to insure that the one shall be fuhy out ot enagement' before the other'engages. For this reason lost motion is provided bet-Ween sone of the parts'connectini-i(` between the cam GS?) and the clutches 2 and e5, in this case between the pin 77 and the cam 75ct (see 8), such lost motion being provided by merely elongating the `ein hole trifle as there shown. The lost motion is or sutlicient amount and is so positioned relative to the associated parts t iat, regardless ol which direction the clutches are moving` the point Tl@ ivill have passed over the point or" cam 58?) before the out moving' clutch disengaged and immediately upon disengagement ot the out moving clutch the point 71a will react on the cam 68?) under the pressure et spring 73a to continue the movement and instantly shift the other clutch into full engagement. lt will be 1 that the carri t table is rovers l, rate at which the carrier is driven is propotionate to the rate at which the talle operates. The propo v changed by alt 0' the position el S, 571 S by replacine)` them uiuc suitable gears is previously described. lt is not conten'iplated that the carrier mov-ement shall be of the same linear rate as that ci the table nor at any hired ratio ot comjarative linear rates, but it ordinarily desirable that, irrespective or the lengti of travel ot the trible, the carrier shell make a trifle less than one complete revolution While the table completes its advance and retreat to starting or Zero position. Thus one reciprocatory movement or" the table constitutes one cycle of table movement and rei elution ot the carrier ordinarily constitutes a corresponding cycle of carrier moif'cineut. table travel may varyr greatly in extent as required 'lor different Work, and it is l'cr this reason that the carrier driving train is provided With rate change gearing, whereby irrespective or. the length of table vel the errier may complete one revolution and be positioned to start a new revolution or car-- rier cycle at approximately the same moment or preferably just after the moment cycle or" carrier travel should correspond to one reciprocatory movement er cycle of table travel avfay from and returning to a Zero or starting' point vlocated at an extreme vend ot the table stroke, it will be apparent that this is not necessary and it is contemplated that, for instance When the table movementy is comparatively short, one carrier revolution or cycle may be made to correspond to two or more table cycles. ln such case a plurality of groups el' carrier dogs corresponding to such number of table cycles are mounted on the carrier come into action one after another, and the driving train for the carrier is adjusted to a ratio producingapproximately one carrier revolution or cycle While the table completes the several cycles. ln such a first table cycle need not cor espond to a second or other table cycle, lor instance the lirst table cycle may move the table from a predetermined starting' ooint to the left and return it te the saine point,y While a second or any subsequent table cycle may move it to the right and back to the startingpoint, or it may maire two movements to the lett a d a third to the right, etc.

Although the table movement may as scribed be controlled completelv from V the carrier movement, it is desirable that the tripping or disengagement of the table movement at the end ot the table cycle, or at least once per carrier cycle shall be done by means of a table dog, but the table movement thus tripped is preferably started again from a carrier dog. By this means it is insured that the table ivill regularly be brought bach to exactly the same point relative to the cutting,- tool and that the carrier will invariably be brought into frac cyclic relationship to the tahle at least once for each carrier revolution.

lt is obviously possible with the mechanism here disclosed to ston the table at anv ioint in its movement and permit it to remain stationary for any desired period, tollen/'ing the arrier and associated drive and control mechanisi i and these parts may then be constructed ot relatively lesser dimensions.

Simple operations, not requiring control from the carrier dogs may be performed cxclusively by the means oi' the hand control previously described, or may be performed using the hand control to establish table Ero quicl: traverse and rice ve'. table dogs toY trip the trible more Yeither elV ich cases the ce; ier n connected n n i' Y l i by remo-.'al oi on 56, 57 e' 5S. Y

It.' carrier control is in use it ie that the clutcl lliifuld not be o hand leur would disai'rz` and carri i 5l inadethis rifa:

for any reason e eye i should become disairanged tl be hand adjusted by previou;r clutch 90 on lead screw fili to coi I tive positions of table and carrier.

A previously mentioned hand A clutch l-la is available to disconnect t'eed and rapid trai newer movement :..n i gated and pr wided to which a hand crank, no own7 i applied, arcover 80a being; ii'ifide rei 'for this purpose, as well as lo proto tbc fears 5G, 57, ai'nl tot i f i dogs. Then setting; up the machine cycles a hand crankV Y niovcinents s" i .le and carrier ie table m ma tic t a ble the squared end of shaft M canse the table aid can. to execute Y movements precii lilas thong-gh power operai-- ed` but as slowly as may be desired v-:hereby the various dees may be positioned more conveniently rnd more accurately.

Ordinarilyy table havin commet forward travel Will be broninn, bach strrti or zer po' 'i sind` il n tripped ont er dicen` i@ed treni newer m. ment by a table doge', therarrier ce ini more to completeits revolucion. 'ia pr( continuous cycles oi table inovcineet, it is only Recess, ry to then permit t1 immediately si rt new rovolimsn,

In other cases it Y s desirable t carrier has def'^"ribed i"y d steil), this l ed by il` rruptinf` Y' y r fi ,c mech; lollovrs:

A lever member 64 is pivcted. (i4/L lixedin the housing; 8O ad, rier and has oppositely extending arms (see Figs. 8 and 9) one ot which G47) engaged with a notch or slot in the rod G7, and the other of which is provided with a latch member 65 pivoted on a pin 65?). Latch G5 sets in a notch in member 64 and is restrained by Vcontact between the notch wall and the side ol the latch to a limited movenient in each direction on its pivot, be' i' urged'in the one direction by a compara any weai: spring 65a to the full limit et its movement. XV hen the rod 67 is shit'ed in a direcrtion to obtain a quick traverse relationship et theE mechanism, the lever Ge'. moved t'liereby to a position Where the point et latch is in the path of movement of a removable doe; ed onthe carrier 51.?. The movement of the lever Sli trom the (og 63 i :i: opposed by the cam 68h, it being necessary 1Jet'ore the dog;- can move the lever to overcome the cam spring YB@ and before this talles place the comparatively Wea( spring 65a will' be overcome and the latch 65 pivoted to its other limit ot travel about pivot (357) after which the continued movement of the dog G3 will move latch and lever together and thereby move rod G7 until clutch i5 disengages and the carrier stops. It will be noted that the pr viously described lost motion between pin 77 and lever '.76 new atects the cam 68?) When moved from doe; 63, to cause it to start its movement later than the disengaging clutch and therefore the camnGS?) has not been moved to a position Where spring' 73a will engage feed clutch Q8 immediately7 upon disengagement of quick traverse clutch l5 as it would no it moved from one ot the other carrier dogs. 'l clutches 28 and l5 will therefore remain in a non-engaged position and the carrier and table both will remain stationary indefinitely, or until the operator desires to start a new cycle of thn carrier. To accomplish thi the handlever 5@ is moved a trifle in a direction to engage feed clutch 28, this mov-es cam 682) to a position Where such engagement Will take place immediately from the action of spring 73a. The ncarrier new starts to move at a feed rate but instantly thereafter the clutches may if desired be shifted to give a quick traverse rate, the shiftingl being eilected either from hand movement of lever 50 or 'from a suitable carrier dogw this being possible because the latch 65 having by the above described movement of lever 50 been swung out ot contact with dog 62h has been returned to its first position under the urging o'f spring 65a, the latch movement being sulticient to swing the poi ,t ol AAdie latch around pivot 6571 to a position where upon reengagement et quick traverse clutch l5 after disengagement as described the latch Will not Contact dog 63, but instead Will stand behind it in its position occupied before it was contacted by dog 63, therdog 63 having` now passed by the latchg the carrier may continue with the new revolution but may be stopped again at its completion.

Thns the carrier it dog 63 is removed will perform continuous cycles et movement and cause any desired cycles of'talble movement according to the carrier dogsused, or if dog 63 is in place the carrier will perform its cycle fand having completed the cycle will stop, but may be immediately or at any subsequent time started again by the operator, but it may be noted that even if dog 63 is inl place, carrier movement may stillbe continuous if when the dog 63 passes the latch 65 the clutchesare shifted to a feed position, in which case the dog will not contact the latch. i

It will be noted that the carrier, the clutches shifted thereby and the motion transmitting connections .vlierebysuch shifting is effected are all closely organized into a single unitary construction with the housing 80, and likewise with the trip elements operable from the table dogs and also the `hand control members, the unit thus organized being directly supported from the stationary bed and positioned for the maximum convenience of the operator when in his normal'operating position, whereby not -only may the normal operative controls be most convenientlyA grasped but also allthe adjustments incidental to the resetting of the various mechanical controls for various work are immediately under the hand and eye of the operator without movement from his normal'position. y

The carrier 52 may and ordinarily does carry all the dogs necessary for any cycle 'of table movement with the exception as -noted previously that it is ordinarily desirable to have one dog on thetable to disengage the table move-ment. Thecarrier is removably mounted as previously described. This combination is of great convenience in .that av series of dogs onceaccurately positioned on the carrier may be preserved-for future use byv removing the Icarrier and dogs bodily, replacing the carrier thus Vremoved 1vwith another for general use, and when 'desired thek carrier maybe replaced again to produce the same cycleof Vtable movement without `the .necessityv vfor adjusting any' of the carrierdogs.fr This is apparent because the `carrier cycle is always one revolution of 'carrier movement andit `may be replaced onlyin--one-position, while the/table cycle may always -bev adjusted in relative position by the means of the independentadjustment provided by the crank clutch k90 `fixed on the table screw. Y l

Having now fully disclosed my invention in one of its preferred forms, I claim:

1. In a milling machine the combination of a movable table, transmission kmechanism therefor, including a. shiftable clutch member,

av control post having ymotion transmitting connection` with said member and having its ,oneend adjacent to a longitudinal edge ofsaid table,a -movable vcontrolv carrier adjacent the other end of said post, a dogonsaid table, a

dog on said carrier and a. plurality of dog contacting surfaces fixed with said post respectively'adjacent the opposite ends thereof and movable into the .path of' movement of the respective dogs. j c

2. In a milling machine having a. movable support and transmission mechanismtherefor including a clutchmember shiftable to`interrupt andto establish movement thereof, the combination of a'v plurality of control means for shifting said clutch, one of said. control meansincluding a trip member having provision for removably attaching a hand lever, and the other control means including a carrier and a dogthereon; there being motion Vtransmitting vconnections operative to transmit motion from said dog to the clutch member, and from saidtrip member to-said clutch support and transmission mechanism ltherefor including a reverser clutch'member shiftable to actuate said support in either direction and clutch means shiftable to opposite positions for actuating said support at a feed or at a rapid traverse rate respectively, the combinationv ofaplurality of dog controlled power trip devices respectively associated with said clutchmember and with said clutch means, the trip device associated with said clutch means being normally adapted to shift said clutch means fromthe one tothe other ofsaid positions, and means associated with the last named device to cause it to move the clutch means only to an intermediate position for stopping said support.

4. In a milling machine having a movable support and transmission mechanism therefor, includingV clutch means shiftable into two positionsrespectively to actuate said support atea feed and'at a quick ltranverse rate, the combination of dog controlled shift mechanism associated-with said clutch means for causing a quick shifting from the :one to the vother of said positions at intervals, and

trip Vmeans operative atintervals to oppose Vmitting position and effective only on said support, shiftable clutch means adapted to change the rate of actuation both of said support and of said carrier and having a nonower-transmittinfr osition and a luralit s a y of dogs respectively movable with said supportand with said carrier and respectively adapted to move the reverser member and the clutch means to their non-power-transmitting positions through suitable motion transmitting connections.

6. In a milling machine having a movable support the combination of control means including a. movable carrier, transmission mechanism including clutch means shiftable to positions respectively effecting a feed and a rapid traverse both of said support and of said carrier, and to a non-power-transmitting position, a dog movable with said carrier, trip means connected for movement of said clutch means and to be moved by said dog and adapted when so moved to quickly shift said clutch means from one to the other of the first named positions, other trip means connected with said clutch means and a second dog on said carrier adapted to contact the last named trip means when said clutch means is inone of the first named positions and to move the clutch means to its non-penfer-transmitting position.

7. In a milling machine having a movable support and transmission mechanism therefor, including a reverser and including clutch means shiftable to two positions respectively effecting a feed and a quick traverse and to a third non-power-transmitting position, the combination of control means including a dog connected to be driven from said clutch means but independently of said reverser, and adapted to move the clutch means from one of the first named positions to the last named position, and control means for said reverser including a dog deriving motion therethrough.

8. In a milling machine having transmission mechanism for support movement including a reverser and a fast and slou1 clutch having a neutral position, the combination of control mechanism therefor, including a dog movable from said reverser for controlling the position thereof and a dog movable from said fast and slow clutch independently ot' the position of said reverser for shifting said fast and slow clutch to said neutral position.

9. In a milling machine having a rotatable spindle, a movable support anc support transmission control mechanism including a movable carrier; the combination of transmission mechanism including a power source, clutch, a shaft driven from said source through said clutch, a feed clutch member, a quick traverse clutch member, a plurality of trains driven from said shaft and respectively connected to drive saidspindle and to drive. said clutch members through branch trains .one of which includes rate change gearing. clutch means shiftable to be alternatively driven from the one or the other of said clutch members, a support driving train including a reverser member and connected with said clutch means, and a carrier driving train including rate change gearing and connected with said support driving ltrain at a point between said clutch means and said reverser.

10. A milling machine as specified in claim 9 in which is provided a plurality of trip means respectively including a dog movable with the support and a dog movable v: ith the carrier, each of said trip means being connectedL for movement. of said reverser member.

ll. A milling machine as specified in claim 9 in which is provided a plurality of power trips for shifting said reverser member, the one trip including a dog movable with said support and motion transmitting connections whereby said reverser member may be positioned in a non-power-transmitting position from support movement., and the other trip including a dog movable with said carrier and motion transmitting connections whercbf.' said reverser may be moved from a non-transmitting to onel of its power-transmitting positions.

l2. In a milling machine having a reciprocable support the combination of transmission mechanism therefore including a shiftable motion reverser member having a nonpower-transmitting position and shiftable clutch means having positions effective to transmit a feed or a quick traverse and shiftable to a non-power-transmitting position, and a plurality of control means one of which includes a dog on said support d motion transmitting connections from said reverser member co-operative therewith to shift the reverser'member to its non-power-transmit-i ting position, and the other of which includes a movable carrier and a variety of dogs movable with said carrier together with motion transmitting connections both from said reverser member land from said clutch means including portions adjacent said car `ier; one of said carrier dogs being adapted to contact one of said portions'and thereby move said reverser member from its non-power-transmitting to another position, another of said carrier dogs being adapted to contact another of said )ortlons and thereby move said clutch Vmeans rom a feed to a quick traverse position, and another of said carrier dogs being adapted to contact another of said portions and thereby move said clutch means to a non-power-transmitting position.

13. In a milling machine having a movable support, the combination of a transmission mechanism including a shiftable motion reverser member having positions effective to transmit a forward or reverse drive to said support and having a non-power-transmitting position, and also including shiftable clutch means having positions eifective to l Cil ber and said clutch means may be moved from the movement of said carrier, from any one to any other of their above named positions, and a. po-wer train for driving said carrier member and connected with said transmission mechanism at a point unaffected by said reverser member.

14. In a milling machine having a stationary bed and a movable worlr table, the combination of a rota-table control carrier supported from said bed and having its axis of movement transverse to the movement of said work table, transmission mechanism including a shiftable table reverser member, and a plurality of adjustable control dogs for the shifting of said reverser member including a dog supported from said table and a dog supported from said carrier.

15. In a milling machine having a movable support and clutch controlled transmission mechanism therefor, the combination of control means for said transmission including a movable carrier and a dog thereon, said control means also including a dog on said support, said carrier and iirst named dog being bodily unitarily removable from and replaceable in their transmission controlling position, and means for the independent movement of said support whereby the dog on said support may be positioned in correct relationship with the dog on said carrier when said carrier is replaced.

16. In a milling machine, the combination of a movable support, transmission mechanism therefor including a power source, a motion interrupting clutch, a reverser and said support in the order recited, a control device; a train for said control device and connected to be driven from said transmission at a point between said clutch and reverser, and means for manually actuating a portion of said transmission when said clutch is iny motion in terrupting position and connectible with said transmission at a point between said clutch and reverser.

17. In a milling machine the combination of a movable support, transmission mechanism therefor including a power source, a motion interrupting clutch, a plurality of branch lines, a clutch shiftable to connect with the one or the other of said branch lines, a reverser, and said support in the order recited; a control device for said shiftable clutch and reverser, a train for said control device and connected with said transmission ata point between said reverser and shiftable clutch, and means for manually actuating` a portion of said transmission when said motion interrupting clutch is in motion interrupting position and connectible with said transmission at a point between said motion interrupting` clutch and said shiftable clutch.

1S. In a milling machine the combination of a movable support, a transmission therefor including a power source, a motion interrupting clutch, clutch means shiftable to change both the rate and direction of support movement, and said support in the order recited; and means for manually actuating said support when said motion interrupting clutch is in its motion interrupting position and connectible to be operative on said support through said clutch means.

19. In a milling machine, the combination of a movable support, a transmission therefor including` a power source, a shiftable clutch and said support in the order recited, a control device for shifting said clutch and connected to be actuated from said transmission at a point between said power source and said clutch, another control device normally connected for shifting said clutch independently of the iirst mentioned device, and means for disconnecting said other control device to prevent shifting of said clutch therefrom, said means being inoperative on the iirst mentioned control device.

20. In a milling machine the combination of a movable support, a transmission therefor including a power source, a plurality of Ybranch lines, clutch means shiftable to connect with the one or the other of said branch lines, a shiftable reverser and said support in the order recited; a control device for shifting said reverser and clutch means and connected with said transmission at a point between said clutch means and said reverser, another control device normally connected for shifting said reverser independently of the first mentioned device, and means for disconnecting said other control device to prevent shifting of said reverser therefrom, said means being inoperative on the first mentioned control device.

In witness whereof I have aiiiXed my signature.

FRED A. PARSONS. 

